Scored Cylinder

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#31

10-16-2018, 08:24 AM

Max Headflow

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Quote:

Originally Posted by Def Mute

compare auto engine pistons with HD pistons. Look at the length of piston skirts...

Not totally sure, but wouldn't a shorter piston skirt create issues other than piston slap when the gap between piston and cylinder is larger?

I seem to remember, some years back, a post that featured an HD piston that had flipped almost 90 degrees (not necessarily because of this issue)

The 2 big issues are rattle and ring seal. If they turn sideways they are really too loose..

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#32

10-16-2018, 11:35 AM

xcbullet

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If your jugs look good on the outside just get some over size Pistons (not big bore) & have your jugs sized to them.

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2ndgenmarine (10-19-2018)

#33

10-19-2018, 10:37 AM

2ndgenmarine

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Quote:

Originally Posted by xcbullet

If your jugs look good on the outside just get some over size Pistons (not big bore) & have your jugs sized to them.

And that is exactly what i am doing after other people in here beat me over the head with the same advice, thankfully, with the patience of saints.

How ever, i do have an additional question. with my jugs going 10 over, should i be looking for an exact 3.885 top end seal kit? or does the standard 103 top end seal kit work? i cant remember if that head to jug seal has or will have an overhang due to the machining.

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#34

10-19-2018, 11:37 AM

djl

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Use the Cometic MLS gasket for the standard 3.875" bore; suggest a .030" for a slight compression bump which those 57 cams will like and the thinner head gasket will tighten up the valve train stack up.